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  • 关于datagridview中checkbox列在选中行的情况下无法操作值

    这几天做项目的时候碰到了个小问题,在datagridview中实现对checkbox列的全选和反选功能。代码如下

                 //全选
                 if (dataGridView1.Rows.Count > 0)
                    foreach (DataGridViewRow dgvr in dataGridView1.Rows)
                    {
                        (dgvr.Cells["checkbox列名称"] as DataGridViewCheckBoxCell).Value = true;
                    }
                 //反选
                  if(dataGridView1.Rows.Count>0)
                    foreach (DataGridViewRow dgvr in dataGridView1.Rows)
                    {
                        (dgvr.Cells[" checkbox列名称 "] as DataGridViewCheckBoxCell).Value = (bool)((dgvr.Cells["DeleteFile"] as DataGridViewCheckBoxCell).Value) ? false : true;
                    }
        发现个问题就是在datagridview选中的那一行上checkbox的值并没有改变。经baidu和google了一下,发现在代码改变状态前,使其readonly变为true就能解决。原理不得而知,先记下来吧!改进后的代码如下:
                 //全选
                 if (dataGridView1.Rows.Count > 0)
                    foreach (DataGridViewRow dgvr in dataGridView1.Rows)
                    {
                        (dgvr.Cells[" checkbox列名称 "] as DataGridViewCheckBoxCell).ReadOnly = true;
                        (dgvr.Cells["checkbox列名称"] as DataGridViewCheckBoxCell).Value = true;
                        (dgvr.Cells[" checkbox列名称 "] as DataGridViewCheckBoxCell).ReadOnly = false;
                    }
                 //反选
                  if(dataGridView1.Rows.Count>0)
                    foreach (DataGridViewRow dgvr in dataGridView1.Rows)
                    {         
                        (dgvr.Cells[" checkbox列名称 "] as DataGridViewCheckBoxCell).ReadOnly = true;
                        (dgvr.Cells[" checkbox列名称 "] as DataGridViewCheckBoxCell).Value = (bool)((dgvr.Cells["DeleteFile"] as DataGridViewCheckBoxCell).Value) ? false : true;
                        (dgvr.Cells[" checkbox列名称 "] as DataGridViewCheckBoxCell).ReadOnly = false;
                    }
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  • 原文地址:https://www.cnblogs.com/goodmangis/p/4290046.html
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